
Photo taken on May 19, 2017 shows a zigzag asphalt road leading to the base camp of Mount Qomolangma in southwest China's Tibet Autonomous Region. (Xinhua/Purbo Zhaxi)

Photo taken on May 19, 2017 shows a zigzag asphalt road leading to the base camp of Mount Qomolangma in southwest China's Tibet Autonomous Region. (Xinhua/Purbo Zhaxi)